On November 9 this year you told the General Assembly: “Extreme weather due to climate change is the new normal … Our challenge remains, clear and urgent: to reduce greenhouse gas emissions, to strengthen adaptation to … even larger climate shocks … and to reach a legally binding climate agreement by 2015 … This should be one of the main lessons of Hurricane Sandy.”

On November 13 you said at Yale: “The science is clear; we should waste no more time on that debate.”

The following day, in Al Gore’s “Dirty Weather” Webcast, you spoke of “more severe storms, harsher droughts, greater floods”, concluding: “Two weeks ago, Hurricane Sandy struck the eastern seaboard of the United States. A nation saw the reality of climate change. The recovery will cost tens of billions of dollars. The cost of inaction will be even higher. We must reduce our dependence on carbon emissions.”

We the undersigned, qualified in climate-related matters, wish to state that current scientific knowledge does not substantiate your assertions.

The U.K. Met Office recently released data showing that there has been no statistically significant global warming for almost 16 years. During this period, according to the U.S. National Oceanic and Atmospheric Administration (NOAA), carbon dioxide (CO2) concentrations rose by nearly 9% to now constitute 0.039% of the atmosphere. Global warming that has not occurred cannot have caused the extreme weather of the past few years. Whether, when and how atmospheric warming will resume is unknown. The science is unclear. Some scientists point out that near-term natural cooling, linked to variations in solar output, is also a distinct possibility.

The “even larger climate shocks” you have mentioned would be worse if the world cooled than if it warmed. Climate changes naturally all the time, sometimes dramatically. The hypothesis that our emissions of CO2 have caused, or will cause, dangerous warming is not supported by the evidence.

The incidence and severity of extreme weather has not increased. There is little evidence that dangerous weather-related events will occur more often in the future. The U.N.’s own Intergovernmental Panel on Climate Change says in its Special Report on Extreme Weather (2012) that there is “an absence of an attributable climate change signal” in trends in extreme weather losses to date. The funds currently dedicated to trying to stop extreme weather should therefore be diverted to strengthening our infrastructure so as to be able to withstand these inevitable, natural events, and to helping communities rebuild after natural catastrophes such as tropical storm Sandy.

There is no sound reason for the costly, restrictive public policy decisions proposed at the U.N. climate conference in Qatar. Rigorous analysis of unbiased observational data does not support the projections of future global warming predicted by computer models now proven to exaggerate warming and its effects.

The NOAA “State of the Climate in 2008” report asserted that 15 years or more without any statistically-significant warming would indicate a discrepancy between observation and prediction. Sixteen years without warming have therefore now proven that the models are wrong by their creators’ own criterion.

Based upon these considerations, we ask that you desist from exploiting the misery of the families of those who lost their lives or properties in tropical storm Sandy by making unsupportable claims that human influences caused that storm. They did not. We also ask that you acknowledge that policy actions by the U.N., or by the signatory nations to the UNFCCC, that aim to reduce CO2 emissions are unlikely to exercise any significant influence on future climate. Climate policies therefore need to focus on preparation for, and adaptation to, all dangerous climatic events however caused.

Signed by:

Habibullo I. Abdussamatov, Dr. Sci., mathematician and astrophysicist, Head of the Selenometria project on the Russian segment of the ISS, Head of Space Research of the Sun Sector at the Pulkovo Observatory of the Russian Academy of Sciences, St. Petersburg, Russia

Syun-Ichi Akasofu, PhD, Professor of Physics, Emeritus and Founding Director, International Arctic Research Center of the University of Alaska, Fairbanks, Alaska, U.S.A.

Bjarne Andresen, Dr. Scient., physicist, published and presents on the impossibility of a “global temperature”, Professor, Niels Bohr Institute (physics (thermodynamics) and chemistry), University of Copenhagen, Copenhagen, Denmark

J. Scott Armstrong, PhD, Professor of Marketing, The Wharton School, University of Pennsylvania, Founder of the International Journal of Forecasting, focus on analyzing climate forecasts, Philadelphia, Pennsylvania, U.S.A.

Rudy Candler, PhD (Soil Chemistry, University of Alaska Fairbanks (UAF)), former agricultural laboratory manager, School of Agriculture and Land Resources Management, UAF, co-authored papers regarding humic substances and potential CO2 production in the Arctic due to decomposition, Union, Oregon, U.S.A.

Roger W. Cohen, B.S., M.S., PhD Physics, MIT and Rutgers University, Fellow, American Physical Society, initiated and managed for more than twenty years the only industrial basic research program in climate, Washington Crossing, Pennsylvania, U.S.A.

Charles B. Hammons, PhD (Applied Mathematics), climate-related specialties: applied mathematics, modeling & simulation, software & systems engineering, Associate Professor, Graduate School of Management, University of Dallas; Assistant Professor, North Texas State University (Dr. Hammons found many serious flaws during a detailed study of the software, associated control files plus related email traffic of the Climate Research Unit temperature and other records and “adjustments” carried out in support of IPCC conclusions), Coyle, OK, U.S.A.

Martin Hovland, M.Sc. (meteorology, University of Bergen), PhD (Dr Philos, University of Tromsø), FGS, Emeritus Professor, Geophysics, Centre for Geobiology, University of Bergen, member of the expert panel: Environmental Protection and Safety Panel (EPSP) for the Ocean Drilling Program (ODP) and the Integrated ODP, Stavanger, Norway

Terri Jackson, MSc (plasma physics), MPhil (energy economics), Director, Independent Climate Research Group, Northern Ireland and London (Founder of the energy/climate group at the Institute of Physics, London), United Kingdom

C. (Kees) le Pair, PhD (Physics Leiden, Low Temperature Physics), former director of the Netherlands Research Organization FOM (fundamental physics) and subsequently founder and director of The Netherlands Technology Foundation STW. Served the Dutch Government many years as member of its General Energy Council and of the National Defense Research Council. Royal Academy of Arts and Sciences Honorary Medal and honorary doctorate in all technical sciences of the Delft University of technology, Nieuwegein, The Netherlands

Tom V. Segalstad, PhD (Geology/Geochemistry), Associate Professor of Resource and Environmental Geology, University of Oslo, former IPCC expert reviewer, former Head of the Geological Museum, and former head of the Natural History Museum and Botanical Garden (UO), Oslo, Norway

Frans W. Sluijter, Prof. dr ir, Emeritus Professor of theoretical physics, Technical University Eindhoven, Chairman—Skepsis Foundation, former vice-president of the International Union of Pure and Applied Physics, former President of the Division on Plasma Physics of the European Physical Society and former bureau member of the Scientific Committee on Sun-Terrestrial Physics, Euvelwegen, the Netherlands

H. Leighton Steward, Master of Science (Geology), Areas of Specialization: paleoclimates and empirical evidence that indicates CO2 is not a significant driver of climate change, Chairman, PlantsNeedCO2.org and CO2IsGreen.org, Chairman of the Institute for the Study of Earth and Man (geology, archeology & anthropology) at SMU in Dallas, Texas, Boerne, TX, U.S.A.

Arlin B. Super, PhD (Meteorology – University of Wisconsin at Madison), former Professor of Meteorology at Montana State University, retired Research Meteorologist, U.S. Bureau of Reclamation, Saint Cloud, Minnesota, U.S.A.

Edward (Ted) R. Swart, D.Sc. (physical chemistry, University of Pretoria), M.Sc. and Ph.D. (math/computer science, University of Witwatersrand). Formerly Director of the Gulbenkian Centre, Dean of the Faculty of Science, Professor and Head of the Department of Computer Science, University of Rhodesia and past President of the Rhodesia Scientific Association. Set up the first radiocarbon dating laboratory in Africa. Most recently, Professor in the Department of Combinatorics and Optimization at the University of Waterloo and Chair of Computing and Information Science and Acting Dean at the University of Guelph, Ontario, Canada, now retired in Kelowna British Columbia, Canada

Göran Tullberg, Civilingenjör i Kemi (equivalent to Masters of Chemical Engineering), Co-author – The Climate, Science and Politics (2009) (see here for a review), formerly instructor of Organic Chemistry (specialization in “Climate chemistry”), Environmental Control and Environmental Protection Engineering at University in Växjö; Falsterbo, Sweden

Brian Gregory Valentine, PhD, Adjunct professor of engineering (aero and fluid dynamics specialization) at the University of Maryland, Technical manager at US Department of Energy, for large-scale modeling of atmospheric pollution, Technical referee for the US Department of Energy’s Office of Science programs in climate and atmospheric modeling conducted at American Universities and National Labs, Washington, DC, U.S.A.

Michael G. Vershovsky, Ph.D. in meteorology (macrometeorology, long-term forecasts, climatology), Senior Researcher, Russian State Hydrometeorological University, works with, as he writes, “Atmospheric Centers of Action (cyclones and anticyclones, such as Icelandic depression, the South Pacific subtropical anticyclone, etc.). Changes in key parameters of these centers strongly indicate that the global temperature is influenced by these natural factors (not exclusively but nevertheless)”, St. Petersburg, Russia

Richard A. Keen, PhD (climatology, University of Colorado), Emeritus Instructor of Atmospheric Science, University of Colorado; former President, Boulder-Denver branch of the American Meteorological Society; Expert Reviewer, IPCC AR5; author of reports and books on the regional weather and climate of Alaska, the Arctic, and North America; NWS co-op observer, Coal Creek Canyon, Golden, Colorado, U.S.A.

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